| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery pack suppressing expansion of a cell element with a small number of components and capable of improving thermal insulation property to the outside. <P>SOLUTION: A battery pack 10 includes: a cell element 11 including a positive electrode, a negative electrode and a separator provided between the positive electrode and the negative electrode; and a resin covering around the cell element 11. The resin includes: a first resin 21 applying a pressing force to the separator from the positive electrode or the negative electrode, the pressing force suppressing expansion of the cell element 11; and a second resin 22 having a foam density higher than that of the first resin 21. <P>COPYRIGHT: (C)2013,JPO&INPIT |
